下列CO和CO2的收集方法说法正确的是( ) A.都能用排水法收集 B.都能用向

题型:选择题

问题:

下列CO和CO2的收集方法说法正确的是(  )

A.都能用排水法收集

B.都能用向上排气法收集

C.CO只能用排水法,CO2一般用向上排气法

D.CO只能用向下排气法,CO2一般用向上排气法

考点:实验室制取和收集气体的思路二氧化碳的性质一氧化碳的性质和用途一氧化碳的毒性
题型:选择题

《射雕英雄传》中的郭靖和母亲李萍避走大漠,时蒙古人称汉人为“阿其那”(狗),“塞斯黑”(猪),到满人统治时期,汉人的情绪爆发最激烈的体现是:

A.民族主义

B.民权主义

C.民生主义

D.民主主义

题型:选择题

地基临塑荷载()。

A.与基础埋深无关

B.与基础宽度无关

C.与地下水位无关

D.与地基土软硬无关

题型:选择题

Right is right. Right? Of course. But is left wrong? Well, the Romans used to think so. They thought left-handed people were mistakes of nature. Latin, the language of the Romans, had many words that expressed this view. Some words we use today still have this meaning. The Latin word “dexter” means “right”. The English word “dexterous” comes from this word. It means “handy” (clever with hands). So, right is handy. But the Latin word for left is “sinister”. The English word “sinister” comes from this word. Sinister means “evil” (very bad). Is it fair to call right-handed people handy and left-handed people evil? Well, fair or not, many languages have words that express such beliefs. In old English, the word for left means “weak”. That isn’t much of an improvement over “evil”.

Not very long ago, children were often forced to write with their right hands. Doctors have since found that this can be very harmful. You should use the hand you were born to use.

People who use their left hands are just starting to get better treatment. But why they get all these bad names in the first place? One reason may be that there are not as many left-handed people as there are right-handed people. There is one left-handed person for every five right-handed ones. People who are different are often thought to be wrong. But attitudes do seem to be changing. Fair-minded right-handed people are finally starting to give left-handed people a hand.

小题1:What does the passage lead us to believe when one writes?

A.He can only use his right hand.

B.He can only use his left hand.

C.He can use either his left hand or his right hand.

D.He can use both his left hand and his right hand.小题2:The last sentence of this article means ________.

A.Fair-minded right-handed people want to change the habit of the left-handed people

B.Fair-minded right-handed people are starting to help the left-handed people

C.Fair-minded right-handed people are starting to use left hand to write and so on

D.Fair-minded right-handed people are starting to give up using their left hands小题3: After we read the article we can certainly know that _______.

A.left-handed people have been treated poorly

B.the number of the left-handed people is larger than that of right-handed people

C.right-handed people are much cleverer than left-handed people

D.left-handed people are less smart but hardworking小题4:Which of the following is NOT right, according to the article?

A.At one time, left-handed people were forced to use their right hands.

B.Left-handed people today are being treated better than those in the past.

C.There are not as many left-handed people as there are right-handed people today.

D.“Dexterous” comes from Latin, means “evil” and English “sinister” means “handy”.

题型:选择题

如图,箱子A连同固定在箱子底部的竖直杆的总质量为M=10kg。箱子内部高度H=3.75m,杆长h=2.5m,另有一质量为m=2kg的小铁环B套在杆上,从杆的底部以v0=10m/s的初速度开始向上运动,铁环B刚好能到达箱顶,不计空气阻力,g取10m/s2。求:

(1)在铁环沿着杆向上滑的过程中,所受到的摩擦力大小为多少?

(2)在给定的坐标中,画出铁环从箱底开始上升到第一次返回到箱底的过程中箱子对地面的压力随时间变化的图象(可写出简要推算步骤)

(3)若铁环与箱底每次碰撞都没有能量损失,求小环从开始运动到最终停止在箱底,所走过的总路程是多少?

       

题型:选择题

急进性肾小球肾炎的临床表现为()

A.伴有中度贫血

B.前驱呼吸道感染

C.蛋白尿、血尿、水肿、高血压

D.肾功能急骤减退

E.早期出现少尿或无尿

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